Automatic or self-threading shuttle.



l PATENTED SEPT. 3, 1907. P.. L. CUMNOGK. y

AUTOMATIC 0R SELF THREADING SHUTTLE. PPLIoATIoN FILED JUNE 4, 190s.

ROBERT L. CUMNOCK, OF ANDERSON, SOUTH CAROLINA.

AUTOMATIC R SELF-THREADING SHUTTLE.

Specification of Letters Patent.

Patented-Sept. 3, 1907..

Applicants ned Jun@ 4,1906. sex-a1 No. 320,150.

. nection with such shuttles for preventing the thread lfrom leaving its proper position or course.

The invention consists in the features and combinati'on and arrangement of parts hereinafter described and particularly pointed out in the'claims.

In the accompanying drawings, Figure l is a plan view'ot' so much oi a shuttle as is necessary to illustrate my invention, my improvement being shown in connection therewith. Fig. 2 is a view oi one feature of my iniprt)veinentdetached from the shuttle. Fig. 3 is an end view looking from the left of Fig. 2. Fig. 4 is an end view looking irom the right 0f Fig. i Fig. 5 is a perspective view of the member shown in Fig. 2. Fig. .('is a cross sectional view on the lain-e 6-6 of Fig. l. Fig, 7 is a side view of the right handend of Fig. 1, showing the threa l-eye and the slot leading thereto, and Fig. 8 isa view oi a modification.-

In these drawings, 1 indicates the body of the'shuttle which is of substantially ordinary form. In constructing the shuttle with 4my improvement I provide a longitudinal threading slit 2 arranged centrally of the shuttle and in line-'with the axis of the bobbin3,

and below this slit a'recess is formed in the body of the shuttle as shown` at 4 which receives the automatic threading device 5. This threading device is in the forni of a frustum of a cone having however, a central 4opening 6 extending from end to end, and having also extending from end to end a slit 7, the mouth of which, indicated at 8,'1ies to one side of the central longitudinal threading slit,2 formed in the body of the'shuttle.

The slit 7 ofthe threading device extends spirally in relation to the circumference o i the threading device as indicated in Figs. 3, 4, 5 and 6. It will be noticed 'that the threading sleeve or device is arranged with its smaller end nearer the point ol' the shuttle and adjacent this end an enlarged recess 9 is formed in the body ol' the shuttle from which a groove or hollow por-v tion indicated at l() extends toward the point of the shut tle, and troni which recess extends the slot 1l which reaches to the. lateral thread-eye 12.

As shown in Figs. G and 8 -the body of the shuttle adjacent the slit 2 is formed with sides or surfaces 13 sloping downwardly to the central slit 2. On one side the body of the shuttle hugs the threading sleeve adjacent the slit` 2 while on the-opposite side of the said slit the body of the shuttle, as indicated at 14, overhangs the and across the slit 11 near the outlet thereof.

threading device leaving a crevice l5 between itself and the louter surface of the said threading device.

This crevice iorlns in effects continuation of thespiral slit 7 extending through the wall of the threading device and the said crevice opens into the longitudinal slit 2 of the shuttle body. It will be further noticed from Fig. l that the overhanging portion14.of the shuttle body provides a shoulder at 16 adjacent the small end of the sleeve or threading device, the said shoulder reaching over what may be termed the discharge end of the spiral slit 7. VThe space between the large end of the threading device and the bobbin is unobstructed as shown in Fig. 1. I

In operation the thread from 'the bobbin enters the longitudinal slit -2 formed in the body of the shuttle and the space between the threading device and the bobbin being unobstructed the thread is free to bo whipped laterally and it will thus enter the crevice l5 beneath the overhanging portieri 14 yof the shuttle body' and be directed thereby to the spiral slit in the threading device which, as before stated, lies 'with its longitudinal mouth 8 to one side of the axial line oi the shuttle. The thread will thus gain the interior opening of the threading device wherein it will be maintained against dethreading not only because oi' the spiral formation of the slit in the threadingr device but because ofthe overhanging portion l-t ol'. the shuttle body presenting, as before stated, the crevice l5 and the shoulder 16, whereby upon the thread striking the vsaidi shoulder, should there be any tendon@ to de thread it will be deflected away from the entrance to the slit 7 and throwntowards the center line ot' the shuttle.

While I prefer to form the threading device oi truncated form I do not limit myself in this respect. The

device may be either rolled or cast, or formed in any -other desired way, I also make provision to prevent the backward passage of the thread through the threadeye slit 1l, said means consisting of a pin I7 extending through the body of the shuttle in an inclined position This pin extendsslightly into' a notch or cut. out portieri in the opposite wall'of the slit from that upon which the pin is located, as shown in Fig. 7 and while the thread is free to pass down the inclined surface of the pin and around the end thereof because of the notch 18 it. will be pYl vented from passing backwardly when it strikes the upwardly inclined underside of the, said piti which will direct it away from the notch 18.`

The sleeve or threading device may be held in place V it will be observed that the inner edg'e of the slit extending from end to end ofthe threading device inclin es upwardly and forwardly.

l. An automatic or self threading shuttle comprising,

straight from end to end, and communicating,r with the` central opening of the threadingy device, said slit of the threadingr device being located to one side of the threading.; slit o1' the shuttle body and beneath an overhanging portion of said shuttle body, the forward end of the threading device lyingr at the juncture of the laterally extending slot. and the longitudinally extending threading slit of the shuttle body, substantially as described:

2. An automatic or self threading shuttle comprising the shuttle body having ltherein a threading slit and having also an overhanging portion, a threadingP device arranged beneath said overhangine; portion of the shuttle body with a crevice or slot formed hy and lbetween the outer side ot' said device and the overhang, said threading,l l

device having a central opening with an upwardly opening slot leading thereto substantially tangential to the said opening and forming a continuation of said crevice into which the lthread is whipped as it leaves the hobbin, the inner edge of said slot in th'e threading device inclining upwardly and t'o'rwardly, substantially as described;

I2. 'An automaticl or self threading shuttle .comprising the shuttle body having,r therein althreadini: slitand a threading: device of hollow tapered form,I with the sinall end directed forwardly' toward the adjacent end of the shuttle,

seam@A said threading device being arranged below the threading,T slit and under over-hanging parts of-the `shuttle body, the overhang-ing part on one side boinay slightly away from the o'uter surface of the threading device to leave :i crevice in between forming; a continuation ot' the threading slit, said tapered threading,l device havin;r a straight slit in its side extending from end to end, substantially :is described. l

4. A self threading shuttle having,a threading slot and overhangintr portions, a hollow tapered threading device arranged beneath the said slot and overhanging portions and having a slit arranged to one side of the threading,r slot and extending; straight from end to end of the tapered device, the space between the threading device and the shuttle body being free for the whipping` in action of'the thread, the overhanging,r portion of the shuttle body providing,r a shoulder at 16 to prevent de-threadina, the openlnp; through the said threading;- device being .also tapered and the inner edge of the slit in the said threading device inelining upwardly and forwardly, substantially as described.

5. In combination with a slit, `a threading device of tubular form having a t read shuttle having a thre ding receiving slot extending lfrom end to en d thereof, said device lying with a crevice between its outer side and the overhanging part oirthe shuttle body adjacent the threading slot of the shuttle and vsaid threading slot of the threading device openingr upwardly' and extending in Ia direction substantially tang'entlal to the interior bore of the threading device and ,forming a continuation of the said crevice, substantially as'described. y y

In testimony whereof, I ax my signature in presence of two witnesses; I 2

l ROBERT L. condition.

Witnesses l RoB'r. E. LxooN,

16. J. BROCK.v 

